Merge "[Thread] graduate CtsThreadNetworkTestCases from postsubmit" into main am: 24ae5c2d06 am: dbe776d5e4

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2804113

Change-Id: I8c33c53a292d5797e6ae10db3fd0f7e5d921c26b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>